But i have no idea how to do the dark blue band thing around the waist. I really want it to fit around my figure and be kinda stiff (but not so stiff that cant bend XD) so should i make a corset type thing?
However I have no experience in making corsets so are there any other ideas?
I mean I suppose I could just make a band with some stiff interfacing and use velcro to wrap it around me, or would that look shabby?

Hi Starflux. The piece you're looking to make is called a waist cincher. While they do make them with boning and laces like a real corset, some are just decorative. You may even be able to buy one, since from a quick google search I saw a few blue ones with that diamond shape. If you want to make it, search for a waist cincher pattern or how-to. Velcro may work, but it depends on how tight you want it to wrap around you. The waist bends a LOT over the course of a day and it may tear the adhesive on velcro right off. You could try sewing the velcro on, using eye and hook closures (lots of them), or adding grommits and lacing.

EDIT: There's a post right below yours on the forum with a similar question. I was wrong, you might want to look for an underbust corset instead of a waist cincher.

You really want some boning in the pattern - otherwise it will wrinkle really badly as you move around. You can always cover the outside of the corset in a fabric so that the boning channels do not show - that way you get the support and no wrinkles plus a "clean" look.

If you didn't use any waist compression I think a zipper would be a decent closure - easy to use and install. I've used velcro before and it's not really that great - I'd only use it in areas where there isn't a lot of movement - going along with that Zil said.

You could also modify the design slightly and turn this into a fake, shaped obi or something depending on what you'd like to do.

When I first saw the reference art, I got the feel that it was supposed to be more like an obi. Still, having no way to tie it, like a traditional obi, a waist cincher would be the way to go. An underbust corset has a different shape, and goes back up at the sides, whereas a cincher does not.

As far as whether or not to use boning, that is up to you. If you want to get the "stiff but less structured" look of an obi, you could simply use a heavier fabric and interfacing, and not have to use boning. If you choose to use boning, but do not want the channels to show, then make the channels in the lining side. However, you will have to use a heavier fabric on the outside or you will still see the lines from the boning. Personally, I think making a waist cincher using a stiff interfacing would suit this really well.

Since there is no break in the front or the back, your best option is side closure. Lacing does not work well for that and would be somewhat out of place on this particular outfit. Velcro would work, but could come apart under the strain of repeated movement. I would suggest either an hook&eye closure or a zipper. If you want it to be more snug and form fitting, a zipper would be the way to go, because the hook&eye would be difficult to close.

I would definitely include the boning. It is not difficult (use the seam allowance of the lining layer of the corset/cincher to create a couple of channels beside each seam), and it will give you a much cleaner appearance, provide some support to the garment, and, importantly, provide some support in the garment where the tail attaches. Without boning, the weight of that tail hanging off the back will pull the cincher down, making the back of it saggy, baggy, and uncomfortable.